Tuesday 3 September

How it was decided

1. 01

   Aṅga

   Caturdaśī runs from 17:40 on Tue 3 Sep to 18:52 on Wed 4 Sep.

   2013-09-03T09:39:47Z → 2013-09-04T10:51:53Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 18:46–20:14 on the 3rd, 18:44–20:13 on the 4th.

   pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Caturdaśī must be present during pradoṣa. It covers 89 of 89 minutes on the 3rd and 8 of 89 on the 4th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

4. 04

   Tie-break

   Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

   priority: unstated → greater-coverage · margin 472 s

5. 05

   Ruling

   Aghora Caturdaśī, Baoding, 2013: Tuesday 3 September.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Aghora Caturdaśī 2013 falls on Tuesday 3 September. Caturdaśī runs from 17:40 on Tue 3 Sep to 18:52 on Wed 4 Sep and covers all of pradoṣa that evening. It also reaches the next evening for 8 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

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Who says what

Institutional rulings are recorded with a source address, and are never edited to agree.